Abstract:
BACKGROUND:Forced expiratory volume in 1 second (FEV1)/forced expiratory volume in 6 seconds (FEV6) has been proposed as an alternative to FEV1/forced vital capacity (FVC) for detecting airway obstruction. A fixed cut-off value for FEV1/FEV6 in a Korean population is lacking. We investigated a fixed cut-off for FEV1/FEV6 as a surrogate for FEV1/FVC for detecting airway obstruction. MATERIALS AND METHODS:We used data obtained in the 5 years of the Fifth and Sixth Korean National Health and Nutrition Examination Survey. A total of 14,978 participants aged ≥40 years who underwent spirometry adequately were the study cohort. "Airway obstruction" was a fixed cut-off FEV1/FVC <70% according to the Global Initiative for Chronic Obstructive Lung Disease guidelines. We also used European Respiratory Society/Global Lung Initiative 2012 equations for the FEV1/FVC lower limit of normal. RESULTS:Among the 14,978 participants (43.5% male, 56.5% female; mean age: 56.9 years for men and 57.0 years for women), 14.0% had obstructive lung function according to a fixed cut-off FEV1/FVC <70%. Optimal FEV1/FEV6 cut-off for predicting FEV1/FVC <70% was 75% using receiver operating characteristic curve analyses (area under receiver operating characteristic curve =0.989, 95% confidence interval 0.987-0.990). This fixed cut-off of FEV1/FEV6 showed 93.8% sensitivity, 94.8% specificity, 74.7% positive predictive value, 98.9% negative predictive value, and 0.8 Cohen's kappa coefficient. When compared with FEV1/FVC < lower limit of normal, FEV1/FEV6 <75% tended to over-diagnose airflow limitation (just like a fixed cut-off of FEV1/FVC <70%). When grouped according to age and FEV1 (%), FEV1/FEV6 <75% diagnosed more airway obstruction in older participants and mild-moderate stages compared with FEV1/FVC <70%. CONCLUSION:A valid fixed cut-off for detecting airway obstruction in a Korean population is FEV1/FEV6 of 75%, but should be used with caution in older individuals and those with mild-moderate airway obstruction.
journal_name
Int J Chron Obstruct Pulmon Disauthors
Chung KS,Jung JY,Park MS,Kim YS,Kim SK,Chang J,Song JHdoi
10.2147/COPD.S113568subject
Has Abstractpub_date
2016-08-19 00:00:00pages
1957-63eissn
1176-9106issn
1178-2005pii
copd-11-1957journal_volume
11pub_type
杂志文章abstract:INTRODUCTION:Randomized interventional trials generally recruit highly selected patients. In contrast, long-term, noninterventional studies can reflect standard of care of real-life populations. DACCORD (Die ambulante Versorgung mit langwirksamen Bronchodilatatoren: COPD-Register in Deutschland [Outpatient Care With Lo...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S112110
更新日期:2016-07-20 00:00:00
abstract:Purpose:To date, no consensus exists on the effects of systemic steroid use on pneumonic chronic obstructive pulmonary disease (COPD) exacerbation owing to trial design issues in previous trials involving these conditions. This multicenter study aimed to evaluate more precisely the effectiveness of the use of systemic ...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S271844
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abstract:Purpose:Whole-body vibrating training (WBVT) is a modality aiming to improve neuromuscular performance of patients with COPD. However, a consensus on the effects of WBVT has not been reached. We aimed to clarify the effects of WBVT on functional exercise capacity, pulmonary function, and quality of life in COPD patient...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章,meta分析
doi:10.2147/COPD.S176229
更新日期:2018-10-10 00:00:00
abstract:BACKGROUND:Whereas the epidemiological association between lung cancer and chronic obstructive pulmonary disease (COPD), a chronic inflammatory respiratory disease, is well known, limited studies have examined the association between lung cancer and non-cystic fibrosis bronchiectasis, a representative chronic airway in...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S80439
更新日期:2015-05-04 00:00:00
abstract:BACKGROUND:The causal association between depression, anxiety, and health-related quality of life (HRQoL) in chronic obstructive pulmonary disease (COPD) is unclear. We therefore conducted a systematic review of prospective cohort studies that measured depression, anxiety, and HRQoL in COPD. METHODS:Electronic databas...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章,meta分析,评审
doi:10.2147/COPD.S58136
更新日期:2014-05-20 00:00:00
abstract::Chronic bronchitis is a relatively common entity among patients with underlying chronic obstructive lung disease. Typical treatment includes pulmonary hygiene, bronchodilators, and antimicrobial therapy. In recent years, the duration of antimicrobial therapy in acute exacerbations of COPD has become shorter and shorte...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章,评审
doi:10.2147/copd.s1189
更新日期:2008-01-01 00:00:00
abstract:BACKGROUND:Previous studies have documented that C-reactive protein (CRP) levels are increased in stable COPD patients. However, most studies have also shown that higher CRP levels are observed in patients with comorbidities like diabetes mellitus and cardiovascular disease. We aimed to investigate if CRP levels are in...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S87015
更新日期:2015-08-31 00:00:00
abstract:BACKGROUND:Presence of chronic obstructive pulmonary disease (COPD) in heart failure (HF) has prognostic and therapeutic implications. Exact prevalence estimates are lacking because most previous studies estimated the prevalence of COPD among HF patients while unstable and in the presence of pulmonary congestion. METH...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S77085
更新日期:2015-06-26 00:00:00
abstract:INTRODUCTION:End-stage lung disease (ESLD) (predominantly caused by chronic obstructive pulmonary disease and restrictive lung disease) is a significant cause of death. Little is known about community care for people with ESLD especially in the period leading to death. This paper describes demographic characteristics o...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/copd.s3890
更新日期:2008-01-01 00:00:00
abstract:BACKGROUND:To estimate the potential cost savings by following the current Global Initiative for Chronic Obstructive Lung Disease (GOLD) guideline recommendations in patients being treated for chronic obstructive pulmonary disease (COPD) with the combination of long-acting β(2)-agonist (LABA), long-acting muscarinic an...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S25805
更新日期:2012-01-01 00:00:00
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journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.2147/COPD.S72650
更新日期:2015-01-05 00:00:00
abstract:Background:People living with both chronic obstructive pulmonary disease (COPD) and frailty have high potential to benefit from exercise-based interventions, including pulmonary rehabilitation, but face challenges completing them. Research to understand ways to optimise exercise-based interventions in this group is lac...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章,评审
doi:10.2147/COPD.S238680
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abstract:OBJECTIVES:To explore the mediating role of protein interleukin-6 (IL-6) on the relationship between forced expiratory volume in 1 second (FEV1) and 6-minute walk distance (6MWD) and, further, to determine whether status variables (such as age, sex, and body mass index [BMI]) operate as moderators of this mediation rel...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S57845
更新日期:2014-10-07 00:00:00
abstract:BACKGROUND:indacaterol is a novel, inhaled once-daily ultra-long-acting β(2)-agonist for the treatment of chronic obstructive pulmonary disease (COPD). OBJECTIVES:this study compared the onset of action of single doses of indacaterol 150 and 300 μg with salbutamol 200 μg, salmeterol-fluticasone 50/500 μg, and placebo ...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.2147/copd.s12120
更新日期:2010-09-07 00:00:00
abstract::COPD is uniquely situated as a chronic disease at the beginning of the 21st century; it is not only an established major cause of mortality and morbidity but is increasing in prevalence despite current medical interventions. In addition COPD is not a stable disease but its natural history is punctuated by periods of a...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章,评审
doi:10.2147/copd.2006.1.3.335
更新日期:2006-01-01 00:00:00
abstract:Aim:The aim of the current study was to assess the serum levels of trace minerals/heavy metals in COPD patients with and without pulmonary hypertension (PH) and to investigate their correlations to demographic, clinical, and biochemical variables. Materials and methods:This cross-sectional study was performed in Van Y...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S164431
更新日期:2018-05-31 00:00:00
abstract:BACKGROUND:Patients with chronic obstructive pulmonary disease (COPD) and chronic heart failure (CHF) seem to have several symptoms in common that impact health. However, methodological differences make this difficult to compare. AIM:Comparisons of symptoms, impact of symptoms on function and health between patients w...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S62563
更新日期:2014-07-18 00:00:00
abstract:INTRODUCTION:Noninvasive ventilation (NIV) improves survival among patients with hypercapnic respiratory failure in hospital, but evidence for its use in domiciliary settings is limited. A patient's underlying risk of having an exacerbation may affect any potential benefit that can be gained from domiciliary NIV. This ...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章,meta分析,评审
doi:10.2147/COPD.S104238
更新日期:2016-09-16 00:00:00
abstract:BACKGROUND:Patients with chronic obstructive pulmonary disease (COPD) often have multiple underlying comorbidities, which may lead to increased health care resource utilization (HCRU) and costs. OBJECTIVE:To describe the comorbidity profiles of COPD patients and examine the associations between the presence of comorbi...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S112256
更新日期:2017-02-23 00:00:00
abstract:INTRODUCTION:According to guidelines, the diagnosis of COPD should be confirmed by post-bronchodilator (post-BD) airway obstruction on spirometry; however, in clinical practice, this is not always performed. The aim of this population-based study was to compare clinical characteristics and prognosis, assessed as mortal...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S127923
更新日期:2017-04-24 00:00:00
abstract:BACKGROUND:Concerns have been raised that treatment of COPD with inhaled corticosteroids may increase pneumonia risk. Responding to a request from the European Medicines Agency Pharmacovigilance Risk Assessment Committee, a pooled analysis of interventional studies compared pneumonia risk with inhaled budesonide-contai...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S128358
更新日期:2017-04-05 00:00:00
abstract::Pulmonary emphysema is characterized by the irreversible loss of pulmonary alveoli. Despite recent advances in the understanding this disease, its treatment remains palliative. In this review, we will successively review the data suggesting (1) that alveolar regeneration systems are functional in the mammalian lung an...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章,评审
doi:
更新日期:2007-01-01 00:00:00
abstract::COPD is a chronic inflammatory disease of the lungs associated with an abnormal inflammatory response to noxious particles, the most prevalent of which is cigarette smoke. Studies have demonstrated that cigarette smoking is associated with activation of the bone marrow, and chronic smoking can lead to the inflammatory...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章,评审
doi:10.2147/COPD.S78875
更新日期:2015-10-22 00:00:00
abstract::Chronic obstructive pulmonary disease (COPD) is one of the top five major causes of morbidity and mortality worldwide. Despite worldwide health care efforts, costs, and medical research, COPD figures demonstrate a continuously increasing tendency in mortality. This is contrary to other top causes of death, such as neo...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章,评审
doi:10.2147/COPD.S106160
更新日期:2016-07-13 00:00:00
abstract::Chronic obstructive pulmonary disease (COPD), a respiratory disease characterized by a progressive decline in lung function, is considered to be a leading cause of morbidity and mortality. Long-acting inhaled bronchodilators, such as long-acting β2 agonists (LABAs) or long-acting muscarinic antagonists (LAMAs), are th...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章,评审
doi:10.2147/COPD.S88246
更新日期:2015-10-30 00:00:00
abstract:BACKGROUND:The purpose of this study was to describe the prevalence of renal and hepatic disease, related laboratory abnormalities, and potentially hepatotoxic and nephrotoxic medication use in a population-based cohort of persons with chronic obstructive pulmonary disease (COPD). METHODS:This was a retrospective case...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S40123
更新日期:2013-01-01 00:00:00
abstract:INTRODUCTION:Early palliative care is not a common practice for patients with COPD. Important barriers are the identification of patients for palliative care and the organization of such care in this patient group. OBJECTIVE:Pulmonologists have a central role in providing good quality palliative care for patients with...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S121294
更新日期:2017-01-17 00:00:00
abstract::COPD is a common complex disease characterized by progressive airflow limitation. Several genome-wide association studies (GWASs) have discovered genes that are associated with COPD. Recently, candidate genes for COPD identified by GWASs include CHRNA3/5 (cholinergic nicotine receptor alpha 3/5), IREB2 (iron regulator...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章,评审
doi:10.2147/COPD.S80227
更新日期:2015-10-19 00:00:00
abstract:BACKGROUND:Patients with chronic obstructive pulmonary disease (COPD) experience respiratory symptoms, which impair quality of life. This pooled analysis of two Phase III studies assessed the impact of aclidinium/formoterol on patients with COPD categorized by symptom status. METHODS:Data were pooled from two 24-week,...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S114566
更新日期:2016-08-29 00:00:00
abstract::Backgroud and objectives: Although lung attenuation distribution and lung volume on computed tomography (CT) have been widely used in evaluating COPD and interstitial lung disease, there are only a few studies regarding the normal range of these indices, especially in Chinese subjects. We aimed to describe the normal ...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S187596
更新日期:2019-07-24 00:00:00